.
39.
The fuselage is now ready for final sanding. Sand off all "Tee-Lock" tabs then round the bottom edges of the fuselage and
the corners of the balsa top deck. Use a sanding block, starting with 80-grit sandpaper. Switch to 150-grit or 220-grit
sandpaper for the final sanding.
Mounting The Wing To The Fuselage
NOTE: The wing must be finished through step 19 before proceeding.
40.
Locate the 1/4"dia.x2" wing hold-down dowel and sharpen one end to a point - keep the point symmetrical and centered.
Push the dowel into the hole in F-2 so that only the point remains sticking out into the wing opening. Slide the wing into
position, making sure it is centered on the fuselage. When you remove the wing, there should be a small indentation in the
L.E. (If not, try using a drop-of paint un the pointed dowel, which will transfer to the wing L.E.)
41.
a. Drill a 1/4" dia. hole about 2" deep at the indentation (or paint mark)
b. Remove the dowel from F-2, then reinsert it about 1/4", leaving most of its length exposed.
c. Trial fit the wing in position, sliding it onto the dowel. Check to see that the wing seats properly on the fuselage. If
not, slowly enlarge the hole in the L.E. until it does seat properly. If necessary, sand the back edge of the basswood
torque rod blocks to allow the wing to seat firmly on the fuselage.
d. With the wing still in position, apply glue (thick CA or epoxy) to the wing dowel and W-1 wing ribs by working through
the opening in the bottom of the wing. Be careful not to allow the glue to run down and bond the dowel to F-2.
e. When dry, remove the wing and fill any gaps around the dowel with another application of glue.
42.
a. The 1/4"x3/4"x1" basswood wing hold-down blocks key into the notches in the fuselage doubler. To accurately fit
them, temporarily tape or pin the wing in place on the fuselage.
b. Working through the lightening holes in the fuselage, install the wing hold-down blocks in the notches, making certain
they are in full contact with the wing upper surface. Tack glue the blocks to the fuselage to hold them in position,
then remove the wing. Finish gluing the blocks in place using medium CA
c. Cut two 1" lengths of 1/2" triangle stock to brace the wing hold down blocks. Glue the triangle braces firmly to the
hold-down blocks and the fuselage doublers.
43.
a. Fit the wing in place on the fuselage and check its alignment (see the General Alignment Diagram on page 20 of
"The Basics of Radio Control"). When you are satisfied that it is aligned correctly, tape it so that it can't move.
b. Carefully mark the drill locations for the wing hold-down bolts. Visually confirm that a hole drilled at the marks will
pass through the approximate center of the basswood hold-down blocks.
c. Drill through the wing and the wing hold-down blocks at the same time with a #7 (or 13/64") drill bit. Keep the drill
perpendicular to the bottom surface of the wing so the heads of the nylon bolts will seat flush against the plywood
plates.
Содержание Four-Star 40 SIGRC44
Страница 1: ......